Temperature and dose dependence of fission-gas-bubble swelling in U3Si2

Yeon Soo Kim; G. L. Hofman; J. Rest; A. B. Robinson

doi:10.1016/j.jnucmat.2009.02.037

Temperature and dose dependence of fission-gas-bubble swelling in U₃Si₂

Yeon Soo Kim, G. L. Hofman, J. Rest, A. B. Robinson

Nuclear Fuels & Materials

Research output: Contribution to journal › Article › peer-review

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Abstract

Large fission gas bubbles were observed during metallographic examination of an irradiated U₃Si₂ dispersion fuel plate (U0R040) in the Advanced Test Reactor (ATR). The fuel temperature of this plate was higher than for most of the previous silicide-fuel tests where much smaller bubble growth was observed. The apparent conditions for the large bubble growth are high fission density (6.1 × 10²¹ f/cm³) and high fuel temperature (life-average 160 °C). After analysis of PIE results of U0R040 and previous ANL test plates, a modification to the existing athermal bubble growth model appears to be necessary for high temperature application (above 130 °C). A detailed analysis was performed using a model for the irradiation-induced viscosity of binary alloys to explain the effect of the increased fuel temperature. Threshold curves are proposed in terms of fuel temperature and fission density above which formation and interconnection of bubbles larger than 5 μ are possible.

Original language	English
Pages (from-to)	443-449
Number of pages	7
Journal	Journal of Nuclear Materials
Volume	389
Issue number	3
DOIs	https://doi.org/10.1016/j.jnucmat.2009.02.037
State	Published - Jun 1 2009

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title = "Temperature and dose dependence of fission-gas-bubble swelling in U3Si2",

abstract = "Large fission gas bubbles were observed during metallographic examination of an irradiated U3Si2 dispersion fuel plate (U0R040) in the Advanced Test Reactor (ATR). The fuel temperature of this plate was higher than for most of the previous silicide-fuel tests where much smaller bubble growth was observed. The apparent conditions for the large bubble growth are high fission density (6.1 × 1021 f/cm3) and high fuel temperature (life-average 160 °C). After analysis of PIE results of U0R040 and previous ANL test plates, a modification to the existing athermal bubble growth model appears to be necessary for high temperature application (above 130 °C). A detailed analysis was performed using a model for the irradiation-induced viscosity of binary alloys to explain the effect of the increased fuel temperature. Threshold curves are proposed in terms of fuel temperature and fission density above which formation and interconnection of bubbles larger than 5 μ are possible.",

author = "Kim, {Yeon Soo} and Hofman, {G. L.} and J. Rest and Robinson, {A. B.}",

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N1 - Funding Information: The submitted manuscript has been created by the UChicago Argonne, LCC as Operator of Argonne National Laboratory under Contract No. DE-AC-02-06CH11357 between the UChicago Argonne, LLC and the Department of Energy. The US Government retains for itself, and others acting on its behalf, a paid-up, nonexclusive, irrevocable worldwide license in said article to reproduce, prepare derivative works, distribute copies to the public, and perform publicly and display publicly, by or on behalf of the Government.

PY - 2009/6/1

Y1 - 2009/6/1

N2 - Large fission gas bubbles were observed during metallographic examination of an irradiated U3Si2 dispersion fuel plate (U0R040) in the Advanced Test Reactor (ATR). The fuel temperature of this plate was higher than for most of the previous silicide-fuel tests where much smaller bubble growth was observed. The apparent conditions for the large bubble growth are high fission density (6.1 × 1021 f/cm3) and high fuel temperature (life-average 160 °C). After analysis of PIE results of U0R040 and previous ANL test plates, a modification to the existing athermal bubble growth model appears to be necessary for high temperature application (above 130 °C). A detailed analysis was performed using a model for the irradiation-induced viscosity of binary alloys to explain the effect of the increased fuel temperature. Threshold curves are proposed in terms of fuel temperature and fission density above which formation and interconnection of bubbles larger than 5 μ are possible.

AB - Large fission gas bubbles were observed during metallographic examination of an irradiated U3Si2 dispersion fuel plate (U0R040) in the Advanced Test Reactor (ATR). The fuel temperature of this plate was higher than for most of the previous silicide-fuel tests where much smaller bubble growth was observed. The apparent conditions for the large bubble growth are high fission density (6.1 × 1021 f/cm3) and high fuel temperature (life-average 160 °C). After analysis of PIE results of U0R040 and previous ANL test plates, a modification to the existing athermal bubble growth model appears to be necessary for high temperature application (above 130 °C). A detailed analysis was performed using a model for the irradiation-induced viscosity of binary alloys to explain the effect of the increased fuel temperature. Threshold curves are proposed in terms of fuel temperature and fission density above which formation and interconnection of bubbles larger than 5 μ are possible.

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Temperature and dose dependence of fission-gas-bubble swelling in U₃Si₂

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